Rotary fluid motor



Jan. 2, 1951 G. D. HUNTER 2,536,938

ROTARY FLUID MOTOR 2 Sheets-Sheet 1 Filed Jan. 3, 1947 Jan. 2, 1951 g. D. HUNTER ROTARY/FLUID MOTOR 2 Sheets Sheet 2 Filed Jan. 3, 1947 Patented Jan. 2, 1951 UNITED STATES ATENT OFFICE A George D. Hunter, Rocky Mount, N. 0.

Original application July 5, 1941, Serial No. 401,248, now Patent No. 2,422,901, dated June 24, 1947. Divided and this application January 3, 1947, Serial No. 720,025

1 Claim.

lhis application is a division of my copending application Ser. No. 401,248, filed July 5, 1941, and now U. S. Patent No. 2,422,901 granted June 24, 1947, and relates t-c improvements in a fluid pressure operated motor of the expansible chamber type.

An object of the invention is to provide animproved fiuid pressure operated motor so constructed as to transmit such force by rotary motion to a driven member with a minimum loss through friction.

Another object of the invention is to provide an improved vane type rotary drum motor having apertures formed in the vanes so as to permit the free passage through the vanes of fluid medium entrapped within the revolving drum so as to lessen the counterforce of such fluid within the drum which would otherwise tend to retard the rotary movement thereof.

These and other objects and features of the in vention are pointed out in the following description in terms of the embodiment thereof which is shown in the accompanying drawings. It is to be understood, however, that the drawings are for the purpose of illustration only, and are not designed as a definition of the limits of the invention, reference being had to the appended claim for this purpose.

In the drawings:

Figure 1 is a transverse sectional view of the motor taken along the lines 2-2 of Figure 2 and looking in the direction of the arrows.

Figure 2 is a sectional view of Figure 1 and illustrating the operation of the motor vanes in the rotary drum.

My invention embodies improvements in a motor 66 as disclosed in Figures 1 and 2 having fluid pressure inlet and outlet conduits 63 and 66.

The motor 50 is composed of a housing 90 in which is mounted a spider drum or rotary driven unit 91. The spider drum 91 is a slotted cylinder having one end closed by the end plate 98, Figure 1, and the other end formed integral with the cylinder. The latter end of the said drum has provided a sleeve 99 which is mounted on the bearings I00 and IM in a, sleeve I02 of the housing 96. Between the bearings are provided oil retainers I03 constructed the same as the oil retainers of the rotary pump described in my U. S. Patent No. 2,422,901. Sleeve 99 is splined or fastened in any convenient manner to a driven axle There is rigidly fastened to an opposite wall I05 of the housing 96 a shaft I06 which is splined to the said wall I05 and fastened by a nut I01. The

spider drum 91 is rotatably mounted on a bearing I08 provided on, the said shaft I06. Further there is rigidly mounted at the inner end of the said shaft I06 an arm I09 to which there is attached off center from the center of the said drum 9? and the said shaft 500 a spindle IIO on which there are mounted at the opposite ends thereof bearings III and M2 on which is rotatably mounted a sleeve I I3. The off center sleeve H3 serves as a cam means to force vanes II4 of the spider drum 91 outward through slots H5 as the spider drum revolves, Figure 2.

The vanes I it as shown in Figures 1 and 2 have provided at the inner end thereof members I26 and slots I I0 and I I! in which are positioned retainer or guide rings I58. There are journaled in the guide rings I It the members I26 of the said vanes I I4. The guide rings I I8 serve to hold the members I20 and the vanes I It always in contact with the cam sleeve H3 which revolves on the spindle 0 with the vanes II 4 and spider drum 9'! so as to thereby reduce friction to a minimum.

Thus it will be readily seen that as the spider drum revolves, each of the said vanes H4, as the same move from the wall H9, will be forced by the cam sleeve H3 outward through the slots H5 until the Vane approaches a point diametrically opposite the wall I I0 and indicated in Figure 2 by the numeral I20 at which point this outward cam action ceases.

Then guide ring I I8 positioned around the cam sleeve H3 and the members I26 of the vanes H4 causes the said vanes IM as it passes this point I20 to slide inwardly as the drum 9'! continues to revolve, until the said vane is flush with the outer surface of the drum 9'! at the wall I I9. The wall II9 serves as the dividing wall between the channels 63 and 64. Thus the sliding vanes serve as a valve closing the opening between the sp'der drum 0i and the housing 96, against which the fluid medium entering through channel 63 or 64 will be forced causing the spider drum 91 and its connected parts to revolve turning the driven axle. Furthermore, by retracting the said vanes when past the point of force, point I20, the fluid medium is released and allowed to pass outward through the outlet channel. There is further provided a rib I22, Figures 1 and 2, to prevent jamming should any of the spider vanes II4 become accidentally disengaged from the ring H8.

The spider vanes II! are slidably mounted between rollers I23 as shown in Figures 1 and 2 so as to reduce friction. The operation and construction of which is clear from the drawings thereof without the necessity of further description.

Adding to the efficiency of the motor 66 are apertures I25 provided in the vanes H4 near the inner end thereof. The said apertures I25 allow for the freepassagethrough the vanes Ll4of any fluid medium within the revolving spider drum 9'! thereby lessening any pressure which may be created within the revolving drum 9'! which would otherwise retard the rotary action of the said drum 91.

Although only one embodiment of the invention has been illustrated and described, various changes in the form and relative; arrangement;

of the parts, which will nowappear to: those skilled in the art, may be madewithout departing from the scope of the invention. Reference is, therefore, to be had to the appended claim for a definition of the limits of the invention.

What is claimed is:

In a motor of the class wherein there is provided a casing, a rotary drum mounted within the casing, and a radially projecting vane slidably mounted in the drum, characterized by the fact that there is combined with the vanela spindl'e mounted within the drum and the spindle having a first portion fixedly positioned eccentric from the center of rotation of the drum, a sleeve, roller bearings to rotatably support the sleeve on the first portion of the spindle, the spindle having a second portion thereof concentric with said drum, other roller bearings to rotatably support the drum on the second portion of the spindie; a member fastened to the inner end of the vane, a guide ring separate from the sleeve mounted around the end member and the sleeve, and the guide ring adapted to slidably hold the and member in engaging relation with the sleeve, whereby the vane is slidably forced in and out of the drum as the drum revolves.

GEO. D. HUNTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES'PA'I'ENTS Number Name Date 125,748 Massey Apr. 16, 1872 1,616,285 Stern Feb. 1, 1927 2,071,799 Mabille Feb. 23, 1937 2,097,718 Bilderbeck Nov. 2, 1937 2,312,961 Cowherd' Mar. 2, 1943 

